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backendTimerUtils.py
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from threading import Timer, Thread
from time import time
class IndefiniteArgsTimer():
def __init__(self, interval, function, exargs=(), callback = None):
self.interval = interval
self.function = function
self.exargs = exargs
# init variable for
self.is_running = False
# sentinel value
self.sentinel = True
# announce callback function
self.callback = callback
def __run(self):
self.is_running = False
self.start_it()
if self.sentinel:
self.function(self.exargs)
def start_it(self):
if not self.is_running and self.sentinel:
self.next_call += self.interval
self._timer = Timer(self.next_call - time(), self.__run)
self._timer.start()
self.is_running = True
else:
self.stop()
def start_all(self):
# set state as running
self.is_active = 1
# re-initialise timer interrupt
self.is_running = False
# get starting time for time limit
self.time_init = time()
# start 0th instance
initial_thread = Thread(target=self.function, args=self.exargs)
initial_thread.start()
# get starting time for 0th timed call
self.next_call = time()
self.start_it()
def stop(self):
self._timer.cancel()
self.is_running = True
if self.callback is not None:
self.callback()
# set state as not running
self.is_active = 0
class IndefiniteTimer():
def __init__(self, interval, function, callback = None):
self.interval = interval
self.function = function
# init variable for
self.is_running = False
# sentinel value
self.sentinel = True
# announce callback function
self.callback = callback
def __run(self):
self.is_running = False
self.start_it()
if self.sentinel:
self.function()
def start_it(self):
if not self.is_running and self.sentinel:
self.next_call += self.interval
self._timer = Timer(self.next_call - time(), self.__run)
self._timer.start()
self.is_running = True
else:
self.stop()
def start_all(self):
# set state as running
self.is_active = 1
# re-initialise timer interrupt
self.is_running = False
# get starting time for time limit
self.time_init = time()
# start 0th instance
initial_thread = Thread(target=self.function)
initial_thread.start()
# get starting time for 0th timed call
self.next_call = time()
self.start_it()
def stop(self):
self._timer.cancel()
self.is_running = True
if self.callback is not None:
self.callback()
# set state as not running
self.is_active = 0
class LimitTimer():
def __init__(self, interval, function, timelimit = None, countlimit = None, callback = None):
self.interval = interval
self.function = function
# init variable for
self.is_running = False
# error catching
assert not ((timelimit is not None) and (countlimit is not None)), 'Cannot use both time limit and count limit'
assert not ((timelimit is None) and (countlimit is None)), 'Time limit xor count limit must be defined'
if timelimit is not None:
self.timelimit = timelimit
elif countlimit is not None:
# convert countlimit to timelimit
self.timelimit = self.interval*countlimit - self.interval/2
# recalibrate time limit to take into account first run at time t=0
self.timelimit = self.timelimit - self.interval
# announce callback function
self.callback = callback
def __run(self):
self.is_running = False
self.start_it()
self.function()
def start_it(self):
if not self.is_running and (time() - self.time_init) < self.timelimit:
self.next_call += self.interval
self._timer = Timer(self.next_call - time(), self.__run)
self._timer.start()
self.is_running = True
else:
self.stop()
def start_all(self):
# set state as running
self.is_active = 1
# re-initialise timer interrupt
self.is_running = False
# get starting time for time limit
self.time_init = time()
# start 0th instance
initial_thread = Thread(target=self.function)
initial_thread.start()
# get starting time for 0th timed call
self.next_call = time()
self.start_it()
def stop(self):
self._timer.cancel()
self.is_running = True
if self.callback is not None:
self.callback()
# set state as not running
self.is_active = 0
def time_in_range(start, end, x):
"""Return true if x is in the range [start, end]"""
if start <= end:
return start <= x <= end
else:
return start <= x or x <= end